The weights in kilograms of 11 bags of sugar and 7 bags of flour are as follows:

Sugar: 1.961, 1.983, 2.008, 2.014, 1.968, 1.994, 2.011, 2.017, 1.977, 1.984, 1.989

Flour: 1.945, 1.962, 1.949, 1.977, 1.964, 1.941, 1.953

(i) Represent this information on a back-to-back stem-and-leaf diagram with sugar on the left-hand side.

(ii) Find the median and interquartile range of the weights of the bags of sugar.